package com.example.yx1.demo44;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationEvent;
import org.springframework.context.ApplicationEventPublisher;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.event.EventListener;
import org.springframework.context.event.SimpleApplicationEventMulticaster;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Component;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Configuration
public class A44_1 {
    public static void main(String[] args) {
        AnnotationConfigApplicationContext context = new AnnotationConfigApplicationContext(A44_1.class);
        context.getBean(MyService.class).doBusiness();
        context.close();
    }

    static class MyEvent extends ApplicationEvent {

        public MyEvent(Object source) {
            super(source);
        }
    }
    @Component
    static class MyService {
        private static final Logger log = LoggerFactory.getLogger(MyService.class);
        @Autowired
        private ApplicationEventPublisher publisher; // 实际上就是 applicationContext的功能之一
        public void doBusiness() {
            log.debug("主线业务");
            publisher.publishEvent(new MyEvent("MyService.doBusiness()"));
            // 主线业务完成后需要一些支线业务，下面是一些问题代码


        }
    }

    @Component
    static class SmsService {
        private static final Logger log = LoggerFactory.getLogger(SmsService.class);
        @EventListener
        public void listener(MyEvent myEvent) {
            log.debug("发送短信");
        }
    }

    @Component
    static class EmailService {
        private static final Logger log = LoggerFactory.getLogger(EmailService.class);
        @EventListener
        public void listener(MyEvent myEvent) {
            log.debug("发送邮件");
        }
    }

    // 添加线程池
    @Bean
    public ThreadPoolTaskExecutor executor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(3);
        executor.setMaxPoolSize(10);
        executor.setQueueCapacity(100);
        return executor;
    }

    @Bean
    public SimpleApplicationEventMulticaster applicationEventMulticaster() {
        SimpleApplicationEventMulticaster multicaster = new SimpleApplicationEventMulticaster();
        multicaster.setTaskExecutor(executor());
        return multicaster;
    }



}
